Fourth tq bernard lands



(No Model.)

0. H. PALMER.

' PULVERIZED FUEL FEEDER.

No. 251,131. 1 PaJ tented DeQQQO-J88I.

UNITED STATES PATENT OFFICE.

CHARLES H. PALMER, OF NEW YORK, N. Y., ASSIGNOR TO ABRAM M. LORYEA, OF SAN FRANCISCO, CALIFORNIA; -SAID LORYEA ASSIGNOR OF ONE- FOURTH TQ BERNARD LANDE, OF NEW YORK, N. Y.

PuLvE'mzE o-FuEL FEEDER.

SPECIFICATION forming part of Letters Patent No. 251,131, dated December 20, 1881. Application filed April 19, 1881. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES H. PALMER, a citizen of the United States, residing in New York city, in the county and State of New York,

have invented certain new and useful I mprovements Relating to Fuel Feeders'and Furnaces, of which the following is a specification.

The invention pertains to that class of feeders adapted for working finely broken or pulro verized fuel by means of rollers, as set forth in apatent'to me datedApril19,1881,No.240,265. 1 have devised furtherimprovements, by which much of the strain on the parts is avoided, the action is made uniform and regular, and means I 5 are provided for effieient regulation of the quantity of fuel supplied, allowing a great range of variation.

The accompanying drawings form a part of this specification, and represent what 1 conzo s'ider the best means of carrying out theinvention.

Figure 1 represents a view looking from the top of the hopper Fig.2, a sectional elevation, and Fig. 3 a longitudinal view, of the toothed rollers in section, showing the scrapers.

Similar letters of reference indicate like parts in all the figures.

F is a fixed casing or frame-work; F, the

I sides of the hopper, and f an offset on the in- 3o terior.

G and H are rollers, which may be connected by gear-wheels (not shown) and turned slowly by any suitable mechanism in the direction to, draw down between them the fuel supplied by the hopper.

I I are scrapers, which scrape out any of the fine fuel which may have stuck in the circumferential grooves of the rollers.

M is a fixed bridge or stout cross-bar, ex-

tending longitudinally of the rollers over the space between them. Its edges are nicely shaped to fit closely to the rollers. The effect is-to prevent the fine fuel which is in the hopper irom descending bodily and becoming jammed in the space between the rollers, and

to allow therollers to bring down past it only so much fine fuel as will be contained in the grooves or other irregularities provided in the I rollers. The edges of the bridge M keep back any surplus of fine material in the same man- 0 ner as .striking removes the surplus grain from the top of avessel in theact of measuring.

The device, so far as yet described, has no means of varying the quantity of fuel supplied, but supplies uniformly what is required to fill the irregularitiesin each roller. Asthe rollers turn, the grooves or irregularities convey the fine material down pastthe bridge, and the further motion of the rollers discharges the material down into the passage n, from whence it is blown or otherwise properly conveyed to the furnace. (Not represented.) I regulate the quantity by means of slides applied above, and which are moved longitudinally of the rollers.

P P are the slides, shown as formed of castiron or other suitable material adapted to fit closely to the rollers. These slides rest on the bridge M and on the ledge or offset f. Their motion is apart and together.- When moved inward to their fullest extent theyare in actual contact and forbid the descent of any fuel. They may be moved apart until they expose nearly or quite the whole length of the rollers to-receive fuel and deliverit below.

Two wheels, HIV, are mounted on a single shaft, R, extending across the hopper and supported in fixed bearings. Each wheel has two pins,1" r From each upper pin, 4, a link,. T, extends to the slide P, to which it is connected by a loose rivet or other flexible conn-ection. From each lower-pin, W, a link, T is correspondingly connected to the slide P A hand-wheel, Q, on the shaft R allows it to beadjusted at any time from the outside. U

is a bar parallel to the axis of the'rollers. It stands over the slides P P and prevents their being lifted by anystrain applied through the links T T.

The action will be readily understood. The slides P. P, being set a proper distance apart, o allow the fuel to descend between them and fill the recesses in the rollers which are presented to that space. The other rollers, which are covered by the slides P P, remain unfilled and idle. The bridgeMstrikes 0% the surplus 5 and allows the properly-filled recesses in the rollers to measure off their proper quantities and deliver them into the passage at below. When the attendant watching the working of the fire wants to give more fuel or less he turns the hand-wheel Q in one direction or the other, so as to move the slides P I apart to give more fuel and together to give less. v

It will be observed that the arrangementis such that the rollers receive the fuel during the same portion of a revolution under all conditions, so that there is ample opportunity for links/P, being short and connecting to the im-' mediately adjacent slide P, while' the other links, T, extend farther and connect' to the farthest slide P The bridge M and the offsetsf may be arranged higher, and the slides P P may be flat or plane. The edges of the bridge M may be ohanifered or beveled from the top. It is important to find and maintain such form as shall properly remove the surplus In such case the links T T both ex coal-dust or other fine fuel without dragging out the same from the proper cavities in the rollers or too greatly compacting the material in those cavities.

I claim as my invention 1. In a fuel-feeding apparatus, the hopper F and pair of recessed" rollers G H, in combination therewith and with the longitudinal bridge M, arranged over the space between them to strike off the surplus and allow only the proper quantity to pass and be delivered to the furnace, as herein specified.

2. The slides I P capable of movement longitudinally of the rolls G H, in combination with said rolls and with the bridge M and hopper F, all arranged for joint operation, as herein specified.

3. The hand-wheel Q, shaft R, wheels It R slides P P, and proper connections T T in combination with each other and with the recessed rollers G H, bridge M, and hopper F, having a shelf or oft'set,f, as herein specified.

In testimony whereof I have hereunto set my hand at New York city, New York, this 9th day of April, 1881, in the presence of two subscribing witnesses.

CHARLES H. PALMER.

Witnesses:

THOMAS D. STETsoN, CHARLES (J. STETSON. 

